import java.util.*;

public class Main {
	static Scanner sc = new Scanner(System.in);
	public static void main(String[] args) {
		int num = 0;
		String key = "";
		while (true) {
			String s = "";
			if (num <= 9) {
				s += "00";
				s += num;
			}
			else if (10<=num && num<=99) {
				s += "0";
				s += num;
			}
			else {
				s += num;
			}
			System.out.println(s);
			String result = sc.next();
			if (result.equals("unlocked")) {
				key = s;
				break;
			}
			num++;
		}
	}
}